* Lost works: Many of Bosch's paintings have been lost over time due to damage, destruction, or simply being untraceable.
* Attributions: It's difficult to definitively attribute every painting to Bosch. Many works attributed to him are now thought to be by followers or imitators.
* Collaborations: Some of Bosch's paintings were likely collaborative works with his workshop, making it difficult to determine his specific contribution.
However, based on surviving works and accepted attributions, experts estimate that Bosch painted around 25-30 paintings.
It's also important to note that this number only accounts for paintings that have been definitively attributed to him. There are likely many more works that were either created by Bosch or inspired by his style that have yet to be identified.